http://bugzilla.suse.com/show_bug.cgi?id=845319
--- Comment #5 from Hannes Reinecke ---
And actually, 'dmraid -p' should fail when there are partitions (or other
device-mapper tables) on that device. The correct action is to remove the
partitions (or other device-mapper devices) _first_ and then remove the dmraid
device.
Much like you'd do with LVM; imagine you'd have a LVM setup on the dmraid
device.
You surely do _not_ want dmraid to succeed here.
(For the same reason the udev rule wouldn't work, neither; we're only getting a
'remove' event if the device has been removed, which it can't, as it's being
held busy by the devices stacked on top.)
So from my POV the system works as designed.
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